Is there a point in which it stops measuring altitude? I'd like to use this in a weather balloon to see how high it travels.
18202
Sorry i cant help you with the height we only went up the mountains in Papua New Guinea to use it for measuring levels for a water supply, but i will say this, this is the most accurate and small device i could saurce, and it realy works. you have to have one.
18203
well... the site boasts 9000M (29,000 ft) or till you freeze the battery... which ever comes first... but if you are weather ballooning, I think this will unfortunately stop or even break before you reach peak altitude....
1806853
It measures ground level zero wherever you press the lauch button, example,if you press the launch button on the ground it will calculate that as zero, if you press the launch button 3 feet off the ground it will calculate that as zero,i tried this, with a confirmed hight of 125 feet it was accurate at ground level and off 3 feet when launched at waist level,so I would say yes it should work fine
2249980
This model does include altimeter functionality that uses barometric pressure for the measurement. That mean that weather changes can have an affect on the measurements. The functions include total climb and an altimeter profile for a given ride (a small graph of the changes during a ride). I'm in Houston so that chart is nearly always flat, but the features do seem to work as expected.
1480682
No it does not display altitude. This device measures your speed, heartrate, and cadence (rate at which you are spinning the pedals). That's all. It does not have any GPS or the like.
1999831
I have only taken mine diving to 30 meters (100')...all was fine. I have also had it on an unmanned stratospheric balloon at 38km (120,000' +) ... same camera - same case. This December I'll take it to 40 km on another stratospheric flight (-60C). Next summer the same camera will be on a 15 day flight at 39km around the norther polar region ( 79 to 82 degrees N ). I've had this same camera on my helmet while skiing and on my mt. bike. This past Spring I took it on a sea kayaking trip and so far it appears to be holding up. Hasn't failed to date, but I have only had it about 9 months. Cheers - steven
499949
No it measures surface temperatures. It's a laser, so it only travels as far as the light will allow it.
1917462
I've heard about this before. The lighters are often manufactured to operate at a modest elevation above sea level. Around 8000 is where some start to fail because the amount of gas released is not calibrated for the reduced amount of oxygen at higher levels. You might also say that because there is less pressure, the gas expels slightly too quickly and blows itself out. A heavier mixture of gas would solve this. If you bought them directly from ZIPPO (through Amazon), and they're not working, then definitely your altitude may be contributing. If you can, venture to an area around you near 2500-3000 ft. and see if you still have the problem. I've heard about this before. The lighters are often manufactured to operate at a modest elevation above sea level. Around 8000 is where some start to fail because the amount of gas released is not calibrated for the reduced amount of oxygen at higher levels. You might also say that because there is less pressure, the gas expels slightly too quickly and blows itself out. A heavier mixture of gas would solve this. If you bought them directly from ZIPPO (through Amazon), and they're not working, then definitely your altitude may be contributing. If you can, venture to an area around you near... » Read More I've heard about this before. The lighters are often manufactured to operate at a modest elevation above sea level. Around 8000 is where some start to fail because the amount of gas released is not calibrated for the reduced amount of oxygen at higher levels. You might also say that because there is less pressure, the gas expels slightly too quickly and blows itself out. A heavier mixture of gas would solve this. If you bought them directly from ZIPPO (through Amazon), and they're not working, then definitely your altitude may be contributing. If you can, venture to an area around you near 2500-3000 ft. and see if you still have the problem. « Show Less
903764
My review was based on its peformance in Florida, ten feet above sea level. How much lower altitude are you thinking of?? It does not perform well in any altitude!!!!!!!!!!!!!!!
39703
I have not tried this... but you can't calibrate it to barometric pressure (aside from resetting your altitude to 0) so as the weather changes it will be less accurate. This also doesn't start recording altitude until you go up 50 feet from when you start recording. Furthermore the battery only lasts for 12 hours of continuous use. I think there are better altimeters for the price for your purposes. You can read the user manual here: http://www.jollylogic.com/http://www.jollylogic.com/www/wp-content/uploads/2011/01/AltimeterOneUserGuideV2-0.pdf
2153573
Good question, but something you would have to check with the manufacturer about, I only use it at sea level.
1156545
It works with Air pressure to measure altitude gain. You set it at zero before launch and it reads the current pressure. Then it reads the pressure at maximum altitude and calculates feet. It is extremely accurate. I highly recommend this product. You may want to get a locator as well though. We did not and lost the rocket after about a dozen launches.
1639039
I've had an issue with this also since the meter doesn't stop to take the reading. I place my hands on the handles and stop pedaling. the first reading is always high, and after about 30 seconds or so starts to go down. I usually go by the second or third number down. I think that's about as close as you can get -- just make sure you stop pedaling when you take the reading.
2181479
I haven't flown with it personally... But we live at high altitudes and during the Pikes Peak Marathon, I have it at start at just over 6,000 feet and go up beyond 14,000 feet without problems and difficulty of the product being used. Really does work, BTW.
563173
No, it reads the surface temperature of whatever object you point it at. You can't "point it" at clear air -- it will read the temperature of the surface across the room.
39832
This device is not a monitoring device, because it turns off after 15-20 minutes. It is used to check the levels of CO in an area and it does have an alarm that sounds when it is at a certain level while you are measuring, so you will know that the CO level is high. So it would not be suitable for traveling unless you just want to know if there is CO present in the place you are going to stay or at.
1847865
The max altitude is determined by a couple of factors- the weight of the payload and the volume of helium you've used to fill the balloon. So it can vary from 75,000 to 90,000 or even more. But once it gets to that max altitude, it'll pop almost immediately; the helium is dragging it up until the balloon itself can't handle the internal pressure.
866816
It does yes, altitude, direction, and velocity. But they are only about as accurate as the coordinates themselves (within 3-5 meters),